Shuttle



Nov. l2, 1929. L; PAV|A 1,735,544

SHUTTLE Filed Feb. 7, 1927 Patented Nov. 12, 1929 rss `LUIGI PAVIA, or ALjLENTowN, PENNSYLVANIA Y i y SHUTTLE` Application Vfiled February 7 This invention relates to so-called selfthreading shuttles and one object is to provide an improved tension device for shuttles and another object is to construct a shuttle so that it may be automatically threaded with certainty when the conditions are otherwise ready for that operationto occur.

In the accompanying drawing, Fig. 1 is a plan of one end portion o lo tle embracing the present invention;

Fig. 2 is a side elevation thereof; Fig. 3 a section on line `3-3, Fig. 2; Fig. al plan, with the top plate 2O re- Fig. 5 an underneath plan view of said top.

plate-; .vy 'Y F`g. 6 a section on ,line (if-6, Fig. 1, Fig. 7 a front elevation `of a fitting e ing certain movable parts;

Fig. 8 a rearelevation thereof; and Figs. 9 and 10 are each a sectional view on line'9-9, Fig. l7 (the casing being omitted in Fig.10) these views respectively showing'by dotted lines the positionsto .which the two main parts illustrated are movable. i

The shuttle includes a bodyl of generally the usual form,with a cavity. 2 for the thread package 3 which may be held therein in any well known way,as`so as to-be automatically replaced by a fresh package when the existing lone is exhausted. A channel 14 leads from the cavity toward the near (or what I term the forward) end of the bodythe same communieating with a shallower longitudinal groove 5 f a'shutmbodyl on the top and at said end of the body and also with a' deep lateral-notch 6 forming a thread Voutlet in what I term the frontside of the body-the near side in Fig. 2-whi'ch notch maybe lined with a metal wear piece 6a con- 40 stituting an upwardly-open eye; ythis may be f secured in place by having its'ends embedded in the main part of the shuttle body and plate 2O thereof (Fig. 2) A e Channel 4L is widened ybetween cavity 2 and groove 5 to receive the tti'ng shown in Figs. 7 to 9. This fitting comprises a casing 7 (which in the sense that it is fixed in the shuttle'by` screws 7x or otherwise'may be regarded as afpart of the body) in which on axes'parallel, with the longitudinal axis of the shuttle 1927; Serial ,Na-1665298@ certain coacting thread-guiding t means are movable and respectively supported by screws 8and 9tapped into the end walls ofthe casing respectively nearthe bottom and upper-rear corners thereof. The lirst of-these-meansincludes an arbor 10 (socket-bearings of which receive the tapered ends of the screws 8) ,and an arm 10ar projecting'intojaslot in the front side of the casing and I(here two) upstanding thread-guides 10b each formed of wire and 60 v I having its upper end rebentto form a hook 1()c at its rear side and terminating `inran arched tailthat at 1()d is inclined to form a cam surface 10e. The normal position of this means is that shown in Figs. 9 and lOby` solid 65 lines, .its arm' 10a, being held against the upper end of slot 7? by a spring-here inthe form of a rubber band 11 bridging the end walls of the casing and knotted exteriorly of one; as at 11a; Fig. 7 and having its other end-engaged 7o with an adjusting screw 12tapped into an eX- tension 7 b of the casing vand accessible for turning (to adjust the band) from above-*- Fig. 4:. The second ofsaid coacting guidinglmeans inc'ludeslthe pin: 13 A'fhaving tapered y ends held in sockets in the screws 9 anda seyriesof (here 3)',thread-guides llextending generally f horizontally across the threadguides 10b, their ends being received in slotsv 7c; each of these guides y'is preferably-indi- 80 Vvidually movable on the ,fulcrum afforded by pin 13 and is here a wire bent to afford acoil'- bearing 14a and an upward'salient herein the form of a beak 14" inclined upwardly and toward the front side ofl the` casing. The normal position of thissecond thread-guiding means is that shown in-full lines in Figs. 9 and-10, eachguide lllbeing held against ythe stoplat the upper end of slot 7 c by a spiral c Vspring 15 arranged'L in a' spring. housing 16 of 9o the casing. and supported by an adjusting screw17. w i' 'f When on threadingxthe shuttley thethread y Ais fully home it stands gripped between the Y guides 10b and 14 of the two coacting thread- 95 guiding means'7 which then tend to hold it Vzigzag as shown at VA in Fig. 1, the thread being engaged under the beaks 14Cb of the guides 14 andby the rear.J sides ofthe guides 10b. The thread may be brought; into this positionv in` 10G `any Way by hand, as by holding a portion of it taut and causing the taut portion to bear down on the cam surfaces 10e of guides 10b to repress them and then,after said portion has passed vthe'hooks 10C, shifting it toward the Vfront of the shutt-le until it is engaged with tension (second stage) may be accomplished' not only, by hand butlutomatically,,as on ay backward and the then ensuing forward movement of .thevzsh'uttlethrough the shed. Thus: y

`Cam surfaces 10"" formawith the downwardly slopingedges 18a of recesses 18 in the end walls' .of casingv a Vfshaped ventrance or intake the casingmay have a Wall y19v (slotted at 19a for thefguides 14) conforming to such edges as so shaped.- Attheopposite or -iront side the casing is coveredbya plate` 20 which is; held ito the yshuttle by screw 21 and has'its Vinner edgecurvedzdownwardly (Fig. 6) and notched (Fig,l .1) for the reception. of the portions 10dfand=guides 10b'. vThis plate Vhas a-sharpenednose 20aloverhanging the notch 6. Anf-.L-shapedlop22' awire) isiXed in an upright transverse plane with rthe mouth of the/.loo'p-open upwardly' and. approximately in alinenient `with the 'mentioned V-shaped j entrance and :its loWerUor-offset portion dif rrented toward and closeto the' threadloutlet 6.VY Forward of` this' loop there may be a rearwardly inclinedjdeflector 23 projecting downwardly from Yplate 20. It be noted thatftheouter offset orclosed endet loop 22 forms' at22a a shoulder around which,faiter 1 the thread, vextending straight orward'from y, the shuttleThas been engaged under the nosel ot'plat'e 20, a bightfmay be formed as shown at A2 in Fig. 1. u

`When-the' shuttle l.moves back through the y shed the thread eXtendsorward therefrom andis permitted byslot/ to press downward at 10 on `the -guides .10b and repress them so as to lbecome.engagedunder their hooks, inthis operation also becoming engaged `under the :nose of the plate 20. v'0n the ensuing forward movement lof theshutti'e'the bigh't AZ is formed around theshoulder` 22, Adeflector 23-.camming the :thread .downwardly and insuring its reaching' the' shoulder. Shoulder 22@ `is-oiiliset-.transx'fersely of the shuttle 4With respect'to the thread supply 3 and consequent-h lywhenthezbight islfdrawntaut the tautening off the portion 'of .the thread between Vthe shoulder. and the supply and incidental lateral shifting thereofy cause 4said portion' to ybecome trapped under the .be'aks 14b asalready eX- plained. y Y Y ,y A

vTo prevent any. possibility yof the thread .workingbackdverthezbeaks Vin .the Vibrating of the coacting thread-guiding means I may nating with the bealrs as shown in Figs. 5 and 6.

The shuttle may be threaded by hand either as firstdescribed herein or in a manner similar tothat in which it'isthreadedautomatically. In either case the'means described acts iirst to catch and hold the thread ywhen the latter is stretched toward the forward end'of the shuttle, clearv of the shoulder, and then to eXert tension on the thread when the Ylatter is drawn into a bight around the shoulder.

Y Having thusiully described my invention what I claim and desire to Secure by Letters Patent is: 7 v Y 1. A self-threadingshuttle corriprisingyin i con'ibination,l a shuttle body, a threadguiding means therein norinallyurge'din vone direction and yie-ldable in the oppositedirectionythe thread being adapted to lbe moved 'l1-inthe" threading operation transversely of 'itself against the side of-said' means flacing-theffirst direction, and y'i'eldable means arranged to. be passed'Hove-r by the threadguiding Y thread during-such yieldingand fkth'ere'-,`upon coactive with theV first means jtoffretai'n-rthe thread in 2 a substantially d'eiinifte position for longitudinal travel, said means normallycooperating with each other when the thread is 1n saidposition to maintain a bend therein;

2. A seltfthreajding 'shuttlecornprisingin combination, a shuttle body,atl'ead-guiding means therein normally urge'di onedirection and yieldable ntthevop osite direction, the thread'being adapted to be moved in thek threading loperation Atransvlers'ely off fit'selvf against thesideof said means' facing the iirst direction, and yieldable threadguiding means having abeak projecting inthe-second I direction and arranged to passedovier by the thread Aduring such' yielding andthereupon` coactiive with the irst'meansfto retainV the thread in a substantially deinitepositi'on for longitudinal travel, Vsaid means normally cooperating `with eachother when the thread ism said position tomaintain abend therein.

3. A self-threading shuttle comprising, jin

combination,V adshuttle body, Aali yieldable thread-guiding member therein' along'. which the thread'is slidable transverselylofitself in thethreading operation in ione direction and having means'to obstruct returnsliding movement of thethread lin the oppositevdirec'- tion, and ymeans thereupon coactiver withsaid member to retainfthe -t-hreadin a' substantially definite position for longitudinal travel', said means normally cooperating withy eachother When thel threadis in sai'd'position' tobmaintain -a bend therein;

' 4. A self-threading shuttle comprising, in'

combination, fa' shuttle body, a cyieldable thread-guiding ,memberztherein along which the thread `isslidable :transversely of itself in the'threading operation inl` one direction liso and having means to obstruct return sliding movement of the thread in the opposite direction, and means thereupon coactive With said member to yieldingly resist longitudinal movement of the thread.

5. In combination, a shuttle body, and

means coactive With each other to hold the means, one for each such portion, respectively urging said portions normally against the thread and the other of said means being movable toward and from and normally urged against the thread.

7. In combination, a shuttle body, threadguiding means each elastically held in a given crossing relation to the other, the thread being adapted to bear against theside of one of saidguiding means and to shift thesame and during such shifting Wipe over and into guiding engagement with the other guiding means, and both guiding means being coactive on such shifting to retain the thread in an approximately definite position for longitud# inal travel.

8. A shuttle having coacting means provided With surfaces arranged to form a thread-entrance Vfor thread entered transversely of itself, one such meansbeing yieldable to the thread from and normally urged toward the other and one of said surfaces having Within such entrance means to catch' and hold the thread against return through said entrance, said coacting means normally cooperating with each other When the thread has been so caught to maintain a bend therein.

9. A self-threading shuttle having coacting means arranged to form a thread-entrance for thread entered transversely of itself, one such means being yieldable to the thread from and normally urged toward the other and. substantially closing said entrance and one having Within such entrance means to catch and hold the thread against return through said entrance and means, coactive With the first means on entering of the thread,'to tension the thread. Y

10. A self-threading shuttle comprising, in combination, a shuttle body having a recess therein into Which thread is enterable transvervs'ely of itself, thread guiding means spana portion adapted to catch the thread on such shifting thereof, and means to thereupon hold the thread bearing against said portion.

11. A self-threading shuttle comprising, in combination,a shuttle body having a recess therein into Which thread is enterable transversely of itself, thread guiding means normally held spanning the recess substantially at the entrance thereto and yieldable there` into and along Which the thread is shiftable transversely of itself, said means having a portion adapted to catch the thread on such shifting thereof, and means, shiftable With the thread, to hold the same pressing against the guiding means during such shifting of the thread.

In testimony whereof I aiiX my signature.

LUIGI PAVIA. Y

ning the recess substantially at the entrance thereto and along which the thread is shiftable transversely of itself, said means having 

